Method for producing regenerated sintered porous shale brick by using waste sintered bricks

Abstract

The invention provides a method for producing a regenerated sintered porous shale brick by using waste sintered bricks. The method comprises the following steps: S1, pretreatment of raw materials: recovering, sorting, crushing, grinding and screening the waste sintered bricks to obtain waste sintered brick powder with a particle size of less than or equal to 2 mm, and crushing, grinding and screening shale to obtain shale powder with a particle size of less than or equal to 2 mm; S2, aging: mixing the waste sintered brick powder and shale powder to obtain a mixture, and then putting the mixture into an aging warehouse for aging, wherein the waste sintered brick powder accounts for 10%-60% of the mixture in percentage by mass; S3, forming and drying; and S4, roasting: roasting the dried green brick and conducting cooling to obtain the regenerated sintered porous shale brick, wherein a roasting temperature ranges from 900 DEG C to 1100 DEG C, roasting time ranges from 4 h to 10 h, and aheating rate ranges from 1 DEG C / min to 2 DEG C / min. According to the water permeable brick, waste sintered bricks and shale are adopted as basic raw materials, solid waste is consumed, the exploitation amount of brick making clay is reduced, cultivated land is saved, and resources are reasonably utilized.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for producing recycled sintered shale porous bricks by utilizing waste sintered bricks. Background technique [0002] In recent years, as my country's economic construction continues to accelerate, my country's urban construction and transportation construction processes are also speeding up. In this process, a large amount of construction waste is produced. The current construction waste treatment in our country is still dominated by accumulation and landfill, and the environmental impact and loss caused by this treatment method are very huge. Construction waste mainly includes waste concrete blocks, waste asphalt concrete, broken sintered brick slag blocks, and wastes such as mortar, metal, and wood scattered during construction. With the acceleration of industrialization and urbanization in our country, the accompanying construction waste is increasing day by day. ...

AI Technical Summary

Problems solved by technology

However, except for a few cities in my country where the utilization rate of construction waste recycling is relatively high, most of the remaining cities are still extensive open-air landfills and stacks, and the resource utilization rate is less than 5%.

At present, the total amount of construction waste piled up in my country has reached 70×10 9 tons, and the fired brick waste is preliminarily estimated to account for 30% to 50% of the total construction waste, most of which are transported to the outskirts for open-air stacking or landfilling without any treatment, and stacking or landfilling requires A large amount of construction investment such as land acquisition, and problems such as scattering and dust in the process of clearing, transporting and stacking have aggravated the impact on the environment and pollution

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